Little bit surprised about the Thomson X2, which I perceive as the stiffest I've ridden so far. It's a minus 17 degree, 120mm, so maybe that accounts for it.Would have liked to have seen Zipp in there and the popular Uno 69.

But a very nice and objective shoot-out yet again. Jason and the guys at FWB are the best!

i tried a pro vibe sprint stem and just installing it, instantly in my mind was like 'this is the stiffest stem i've ever felt'. Forreal that thing is just a block of carbon, wicked. Too bad i didn't keep it! =(

First of all, this is fantastic--thank you for conducting these tests!

It'd be great to see results for the Bontrager XXX lite carbon stem.

Also--and I realize this would incur significant cost--but it would be fascinating to see results of a third-party test on forces necessary to cause stem failure. I tend to obsess over stems a bit and would use an Extralite if not for my (unreasonable?) concerns about strength. I use a Ritchey c260 instead.

I am disappointed with Pro Vibe which I am planning to put on my bike.But when I look which stem Marcel Kittel rides, I am not that worried.Yes, it is not Pro Vibe with 2 bolted front clamp. Little offtopic: Does anyone know what model of stem he rides? I can't find it on Pro website.

I would be interested to know the stiffness of Cannondale C2 stem. It is cheap, aluminium and quite light for the price (approx. 125g).

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